// This file is part of Eigen, a lightweight C++ template library
// for linear algebra.
//
// Mehdi Goli    Codeplay Software Ltd.
// Ralph Potter  Codeplay Software Ltd.
// Luke Iwanski  Codeplay Software Ltd.
// Contact: <eigen@codeplay.com>
//
// This Source Code Form is subject to the terms of the Mozilla
// Public License v. 2.0. If a copy of the MPL was not distributed
// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.

/*****************************************************************
 * TypeCasting.h
 *
 * \brief:
 *  TypeCasting
 *
 *****************************************************************/

#ifndef EIGEN_TYPE_CASTING_SYCL_H
#define EIGEN_TYPE_CASTING_SYCL_H

namespace Eigen {

namespace internal {
#ifdef SYCL_DEVICE_ONLY
    template <> struct type_casting_traits<float, int>
    {
        enum
        {
            VectorizedCast = 1,
            SrcCoeffRatio = 1,
            TgtCoeffRatio = 1
        };
    };

    template <> EIGEN_DEVICE_FUNC EIGEN_ALWAYS_INLINE cl::sycl::cl_int4 pcast<cl::sycl::cl_float4, cl::sycl::cl_int4>(const cl::sycl::cl_float4& a)
    {
        return a.template convert<cl::sycl::cl_int, cl::sycl::rounding_mode::automatic>();
    }

    template <> struct type_casting_traits<int, float>
    {
        enum
        {
            VectorizedCast = 1,
            SrcCoeffRatio = 1,
            TgtCoeffRatio = 1
        };
    };

    template <> EIGEN_DEVICE_FUNC EIGEN_ALWAYS_INLINE cl::sycl::cl_float4 pcast<cl::sycl::cl_int4, cl::sycl::cl_float4>(const cl::sycl::cl_int4& a)
    {
        return a.template convert<cl::sycl::cl_float, cl::sycl::rounding_mode::automatic>();
    }

    template <> struct type_casting_traits<double, float>
    {
        enum
        {
            VectorizedCast = 1,
            SrcCoeffRatio = 2,
            TgtCoeffRatio = 1
        };
    };

    template <>
    EIGEN_DEVICE_FUNC EIGEN_ALWAYS_INLINE cl::sycl::cl_float4 pcast<cl::sycl::cl_double2, cl::sycl::cl_float4>(const cl::sycl::cl_double2& a,
                                                                                                               const cl::sycl::cl_double2& b)
    {
        auto a1 = a.template convert<cl::sycl::cl_float, cl::sycl::rounding_mode::automatic>();
        auto b1 = b.template convert<cl::sycl::cl_float, cl::sycl::rounding_mode::automatic>();
        return cl::sycl::float4(a1.x(), a1.y(), b1.x(), b1.y());
    }

    template <> struct type_casting_traits<float, double>
    {
        enum
        {
            VectorizedCast = 1,
            SrcCoeffRatio = 1,
            TgtCoeffRatio = 2
        };
    };

    template <> EIGEN_DEVICE_FUNC EIGEN_ALWAYS_INLINE cl::sycl::cl_double2 pcast<cl::sycl::cl_float4, cl::sycl::cl_double2>(const cl::sycl::cl_float4& a)
    {
        // Simply discard the second half of the input
        return cl::sycl::cl_double2(a.x(), a.y());
    }

#endif
}  // end namespace internal

}  // end namespace Eigen

#endif  // EIGEN_TYPE_CASTING_SYCL_H
